Electrochemical Sensor Membrane Buffering for Signal Stability
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Solution Overview
Problem
Current electrochemical sensors require pre-use testing and validation, which is time-consuming and may not perform effectively 'out of the box,' especially in critical applications like ICU monitoring, where rapid and accurate analyte detection is essential.
Innovation Solution
Incorporating a buffering agent, such as acetate ion, bicarbonate ion, or carbonate ion, into the analyte sensing membrane or testing solution to maintain signal stability and accuracy, reducing the need for pre-use testing and validation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pre-use testing and validation is performed for electrochemical sensors, then measurement accuracy and reliability are improved, but time consumption and operational complexity increase
Solution Approach 1:
The sensor is pre-tested and validated in-vitro before deployment, with performance characteristics documented and stored. This preliminary validation allows the sensor to be ready for immediate use in critical applications without requiring on-site testing, thus resolving the contradiction between ensuring reliability and minimizing time loss.
Solution Approach 2:
The patent creates a virtual copy of the sensor's performance characteristics through in-vitro validation data and algorithms. This digital representation allows the sensor to be validated without physical pre-use testing at the point of use, enabling rapid deployment while maintaining accuracy through the pre-characterized performance model.
2Measurement precision
If pre-use testing is required for sensor validation, then measurement accuracy is improved, but ease of operation deteriorates
Solution Approach 1:
The sensor system performs self-validation through pre-characterized performance data and built-in compensation algorithms. The sensor automatically compensates for drift and maintains accuracy without requiring external validation procedures, thus improving ease of operation while preserving measurement precision.
Solution Approach 2:
The system incorporates feedback mechanisms where pre-validation data is used to continuously monitor and adjust sensor performance. This allows the sensor to maintain accurate measurements without requiring manual validation, as the system self-corrects based on pre-established performance characteristics and real-time monitoring.
3Stability of the object's composition
If buffering agent is added to sensing membrane, then signal stability is improved, but device complexity increases
Solution Approach 1:
The sensing membrane is formulated as a composite material incorporating buffering agents (such as phosphate, carbonate, or bicarbonate buffers) integrated into the membrane matrix. This composite structure provides signal stability through the buffering capacity while maintaining a unified membrane composition that does not significantly increase device complexity.
Solution Approach 2:
The patent modifies the chemical parameters of the sensing membrane by incorporating buffering agents at specific concentrations and pH levels. This parameter change enhances signal stability without requiring complex additional components, as the buffering capacity is achieved through controlled chemical composition rather than complex structural additions.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The buffering agent maintains signal output stability and accuracy over extended periods, especially at high analyte concentrations, enabling rapid and accurate analyte detection without the need for pre-use validation, thus addressing the limitations of existing sensors.
Implementation Method 1
the buffering agent provides sufficient buffering capacity to neutralize acidic, electrochemically produced by-products of the analyte sensing membrane
Implementation Method 2
produces a rapid and accurate electrical current proportional to the true analyte concentration
Data Source
AI summary
Electrochemical sensors for measurement of an analyte comprising an analyte sensing membrane comprising at least one salt of acetate ion, carbonate ion, bicarbonate ion, or mixtures thereof. Sensor testing methods comprising contacting an electrochemical sensor with an aqueous solution comprising at least one salt of acetate ion, carbonate ion, bicarbonate ion, or mixtures thereof and contacting the electrochemical sensor with one or more concentrations of analyte, the one or more concentrations of analyte being in the clinical concentration range of the analyte.